NECESSITY, FUNCTION,
AND CONFORMITY: KRS 351.330 requires that the Department for Natural Resources
prescribe rules to ensure that the use of explosives be done in a manner so
that the safety of persons or property is not threatened. This administrative
regulation provides rules to protect persons and property from the effects of
excessive airblast.

Section 1. (1)
Maximum allowable airblast at any dwelling, public building, school, church,
commercial or institutional building shall not exceed 129 decibels when
measured by an instrument having a flat frequency response (+/- 3 decibels)
over a range of at least 6 to 200 hertz. If the airblast is measured with an
instrument having a flat frequency response (+/- 3 decibels) over a range of at
least 2 to 200 hertz, the corresponding limit is 133 decibels.

(2) If the
department believes that the airblast from a blasting operation is exceeding or
threatening to exceed the limits in subsection (1), it may require that the
blaster monitor the air airblast for a specified period.

(3) The blaster
shall take precautions, including the adequate confinement of all explosive
materials, to ensure that the airblast limits in subsection (1) of this section
are met.

(4) The department
may require lower limits than those specified in subsection 1 in the vicinity
of buildings with increased susceptibility to damage from airblast, such as
those with large plate glass windows, or in areas where excessive airblast
could be deemed unacceptable, such as near hospitals or schools. (17 Ky.R.
3340; eff. 6-26-91; TAm eff. 8-9-2007.)